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§5245. Electric Detonation of Explosives During Lightning and Dust Storms.

(a) Upon the approach of a lightning or dust storm, blasting operations shall
be stopped and all persons in the blast area withdrawn to a safe location.

(b) Provisions shall be made for warning crews when an electric or dust storm
approaches.

(c) In underground operations using electrical blasting systems, instrumentation
to determine the presence of a lightning and dust storm within 15 miles of the
portal and means to signal the heading shall be provided.